DIAMETER: 1.250″+/-.010″
THICKNESS: 0.040″+/-.001″
PARALLELISM: < 20 ARC SECONDS
EDGE BEVEL: 0.25mm MAXIMUM FACE WIDTH, 2 PLACES
TRANSMITTED WAVEFRONT: POWER: 1/4 WAVE MAXIMUM
(@ 633nm) IRREG: 1/10 WAVE MAXIMUM
SURFACE QUALITY: C-C PER MIL-C-48497A, 2 FACES.
SURFACE ROUGHNESS: < 25 ANGSTROMS RMS, 2 FACES.
CLEAR APERTURE: CENTRAL 0.680″ X 0.600″
RECTANGULAR AREA, BOTH FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, CSI HEMEX GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001).
COATING: NONE, NOT REQUIRED.